change user from standard to admin

Hello, i installed the new OS X 10.10 then i had to restore to mavericks
after that my admin user MohAlhassan changed to Standard and I don't know how to make it Admin again
this window ask for admin info to unlock, what are they? is there a default user/pass ?


iMac, OS X Mavericks (10.9.4)

 

thank you! that worked